root/pypi: links for pip2nix

root/pypi pip2nix-0.7.0.tar.gz
root/pypi pip2nix-0.6.0.tar.gz
root/pypi pip2nix-0.5.0.tar.gz
root/pypi pip2nix-0.4.0.tar.gz
root/pypi pip2nix-0.3.0.tar.gz
root/pypi pip2nix-0.2.0.tar.gz
root/pypi pip2nix-0.1.0.tar.gz